In fact, we were surprised to find out that many iconic Hollywood redheads aren't redheads at all — and we're not talking about celebs who go ginger for movies, like Megan Fox recently did for a role in Michael Bay's upcoming "Teenage Mutant Ninja Turtles" film. We're talking about actresses and entertainers who we've never really seen without their red tresses, including natural blondes Amy Adams, Christina Hendricks and Emma Stone (scroll down for a more complete list).

It’s surprising, sure, but there’s a reason why Hollywood’s faux-redheads look so flawless with their fiery locks, and it’s because they trust their hair to the best. Los Angeles-based stylist Janine Jarman has worked with celebs such as Scarlett Johansson and Ariana Grande, and she’s got some advice for anyone looking to acquire a crimson coif.

“Red hair is kind of high maintenance,” first warns Jarman. “It requires special care. So if you wash your hair every day and hate frequent salon visits — every 4 to 6 weeks — this is not for you,” she says.

The next step, if you’re willing, is to find a great specialist. “I would ask a redhead you see or know for their stylist recommendation,” suggests Jarman. “Bring lots of different examples of reds you like, and be open for an expert to prescribe a red that is the most flattering shade, as well as realistic to do to your hair, without compromising its condition.”

But, as Jarman explains, blondes may be better at going red. “It’s easier for blondes,” she says, “but [the colors] fade out of blondes faster.” Brunettes need not worry, though; they too can become redheads — they simply need to pre-lighten at a trusted salon. “Or, there are some colors like Magma by Wella that can lift and deposit red,” notes Jarman, who insists that these coloring processes be left to the professionals.

But by Jarman’s own admission, these guidelines aren’t set in stone. “Break the rules and do the red you love and feel most comfortable in.” After all, “breaking the rules” has worked for a number of Hollywood’s “redhead” celebs.

Read more about them in the slides below, and think about which of their styles best suits you!

Reuters/Reuters

Emma Stone

Emma Stone rose to fame with her signature red locks, but her natural hair color started to make a comeback when she dyed it back for her role in "The Amazing Spider-Man." "My natural hair is blonde, so it's kind of nice," Stone said in an interview with MTV. "I looked in the mirror and said, 'Oh my God, it's me again! It's been so long!'"

During her early modeling career, "Mad Men" actress Christina Hendricks ditched her blonde hair for red, but her agency was none-too-pleased. "The head of my agency was like, 'You look terrible, it's so ugly, you cannot have red hair,'" she told the UK's Daily Mail. According to the actress, she booked three modeling gigs in the time it took for the dye to wash out, so she's kept her red hair ever since.

Reuters

Amy Adams

Amy Adams seems to play a lot of wholesome, innocent characters in her films, but that wasn't always the case. "Everyone's always like: 'You're so typecast.' But actually, when I came out to L.A., I was always the bitchy girl," said the actress in a Washington Post interview. She blamed her natural blonde hair for those earlier roles, because once she changed it, she started nabbing better parts.

Reuters

Cynthia Nixon

"Sex and The City" actress Cynthia Nixon has always appeared with red hair in the series, but not so much off-screen. "I am not a redhead, I'm a blonde," said Nixon, who was sporting blonde tresses during the release of "Sex and The City 2" in New York. "Right now, this isn't my natural blonde color. I had to dye it in order to get the red out of it," she told Marie Claire.

"Will and Grace" actress (and natural brunette) Debra Messing credits a dye-job gone wrong for her success in Hollywood. While working on "A Walk In the Clouds," the hair department colored her locks red instead of blonde, but she soon noticed she was getting more work with her fiery new 'do.

Reuters

Lucille Ball

Comedienne Lucille Ball often joked about her hair color, so it's no surprise that she wasn't a natural redhead. She dyed her hair blonde during her early career before finally settling on red. According to Bella Sugar, she also quipped that she kept Egypt's economy afloat with her orders of henna.

Reuters

Deborah Ann Woll

Deborah Ann Woll plays a redheaded vampire on HBO's "TrueBlood," but the actress has been dyeing her hair since she was 14. "As a fair skinned blonde, I disappeared into the background," Woll told Elle magazine. "I've always been a loner, so I suppose dyeing my hair red was a way to say, 'I'm here, I exist, I'm a human being and you can't just push me aside.'"

Reuters

Kate Walsh

"My natural color is a mousy ash-brown," joked Kate Walsh during an interview with InStyle. "It's really hot!" However, the "Private Practice" and "Grey's Anatomy" actress said that reddish hair does run in her family, as her brother has strawberry blonde hair and her grandmother has deep chestnut hair.

Reuters

Alyson Hannigan

Alyson Hannigan claims that "Buffy The Vampire Slayer" creator Joss Whedon made her go red for the role of Willow Rosenberg. "Joss had us all over to his house," she remembers. "Charisma [Carpenter] and Sarah [Michelle Gellar] and I all had brown hair at the time. Joss said, 'All of your hair is kind of the same shade. Does anyone want to be red?' I went for it. Eventually Sarah got more and more blonde, but it was because we all had a brownish, auburn mane."